Subscript indices must either be real positive integers or logicals

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akgec
akgec 2013-7-21
i am trying to add column of a large matrix using sum instruction but is getting this error "Subscript indices must either be real positive integers or logicals." kindly suggest me a way out
q =
0 76
0 76
0 76
0 76
0 76
0 76
0 76
55 21
57 19
57 19
57 19
56 20
11 65
11 65
10 66
11 65
10 66
11 65
11 65
11 65
11 65
10 66
11 65
10 66
11 65
11 65
11 65
11 65
10 66
11 65
10 66
11 65
11 65
11 65
11 65
10 66
11 65
10 66
11 65
11 65
11 65
11 65
10 66
11 65
10 66
11 65
11 65
11 65
11 65
10 66
11 65
10 66
11 65
11 65
11 65
11 65
10 66
11 65
10 66
11 65
11 65
11 65
11 65
10 66
11 65
10 66
11 65
11 65
11 65
11 65
10 66
11 65
10 66
11 65
11 65
11 65
11 65
10 66
11 65
10 66
11 65
11 65
11 65
11 65
10 66
11 65
10 66
11 65
11 65
11 65
11 65
10 66
10 66
9 67
9 67
8 68
8 68
7 69
6 70
6 70
5 71
5 71
3 73
0 76
0 76
0 76
0 76
0 76
0 76
0 76
0 76
0 76
0 76
0 76
0 76
>> pri=sum(q)
Subscript indices must either be real positive integers or logicals.

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回答（2 个）

Azzi Abdelmalek
Azzi Abdelmalek 2013-7-21
You have probably used sum as a variable in your code. Check it by typing
sum
Image Analyst
Image Analyst 2013-7-21
You probably redefined sum to be a variable or function in your code, thus destroying it, or actually just using yours in preference to the built-in sum() function. Try putting these lines in and seeing what it says.
whos sum
which -all sum

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